GB2039389A - Balance-wheel for time-keeping instruments - Google Patents
Balance-wheel for time-keeping instruments Download PDFInfo
- Publication number
- GB2039389A GB2039389A GB7944265A GB7944265A GB2039389A GB 2039389 A GB2039389 A GB 2039389A GB 7944265 A GB7944265 A GB 7944265A GB 7944265 A GB7944265 A GB 7944265A GB 2039389 A GB2039389 A GB 2039389A
- Authority
- GB
- United Kingdom
- Prior art keywords
- balance
- wheel
- springs
- spiral
- hair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/04—Oscillators acting by spring tension
- G04B17/06—Oscillators with hairsprings, e.g. balance
- G04B17/066—Manufacture of the spiral spring
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Rehabilitation Tools (AREA)
- Pivots And Pivotal Connections (AREA)
- Springs (AREA)
- Testing Of Balance (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
A balance-wheel for time-keeping instruments, in which two identical hair springs 1,2 of flat spiral design have their inner and outer ends respectively attached, at points which are diametrically opposite to one another, on the one hand to the staff or balance-wheel arbor 5 and on the other hand to the balance cock 8 and are arranged to lie in two planes parallel to one another and normal to the balance-wheel axis, is characterised in that the hair-springs are coiled in the same sense and are rotationally staggered relative to one another through 180 DEG about the axis of the balance-wheel. The two spiral hair- springs may each be provided with an overcoil 6, 7 and turned outwards in like manner but in opposite axial directions with regard to the balance-wheel arbor. Regulation is preferably effected through a symmetrical two-armed lever 4 seated on the balance-cock 8 and rotatable with regard to the balance- wheel arbor, said lever arms spanning the two spiral hair-springs at the circular regulating ends of the outermost coils. <IMAGE>
Description
SPECIFICATION Balance-wheel for time-keeping instruments
The invention relates to a balance-wheel for timekeeping instruments, in which two identical spiral hair-springs of flat spiral design are attached at points at any given time diametrally opposite to one another on the one hand to the staff or balancewheel arbor and on the other hand to the balancewheel cheek in two planes parallel to one another and normal to the balance-wheel axis.
There is known a balance-wheel-like movement regulatorfortime-keeping instruments, in which the arbor of an oscillatory member is connected through respective first and second spiral hair-springs with respective plates. The two identical spiral hairsprings are attached to the balance-wheel arbor and to the balance-wheel cheek in two planes extending normal to the balance-wheel axis and parallel to one another, in such a way that they confront one another when projected and brought together. With such an arrangement of the spiral springs the centre of gravity of the arrangement changes its position on deflection of the balance-wheel from the equilibrium position. Considered in the plane of projection, the centre of gravity is moved to the axis of symmetry of the confrontation.
The object of the invention is to provide a balance-wheel of the kind first-mentioned, in the case of which a change of the centre of gravity can no longer occur on deflection of the balance-wheel.
In accordance with the present invention, I provide a balance-wheel for time-keeping instruments, in which two identical spiral hair-springs of flat spiral design are attached at points at any given time diametrally opposite to one another on the one hand to the staff or balance-wheel arbor and on the other hand to the balance-wheel cheek in two planes parallel to one another and normal to the balancewheel axis, the two spiral hair-springs being coiled in the same sense and being rotationally staggered relative to one another through 1800 about the axis of the balance-wheel.
Through such an arrangement of the spiral hairsprings relative to one another, what is attained is that, apart from a slight deformation of the spiral hair-springs under the influence of the force of gravity, the centre ofgravity of the balance-wheel with the two spiral hair-springs is continually in the axis of the balance-wheel whatever the deflection of same. The consequence of this is that the bearing friction of the balance-wheel is less irregular and, moreover, is also smaller; the accuracy is greater and the working life superior to that of a balancewheel of the known type.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings wherein:
Figure lisa diagrammatic plan view of a balancewheel with two spiral hair-springs in accordance with the invention;
Figure 2 is a side view of the balance-wheel system according to Figure 1, and
Figure 3 shows the structural appearance of the
balance-wheel system according to Figure 2.
In the drawings the reference numerals 1 and 2
each denote a breguet hair-spring, the reference
numeral 3 denotes the rim of the balance-wheel, the
reference numeral 4 denotes a regulating lever with
arms, the reference numeral 5 denotes the balancewheel arbor, the reference numeral 6 denotes the
overcoil for the spiral hair-spring 1, the reference
numeral 7 denotes the overcoil for the spiral hairspring 2, and the reference numerals 8 and 9 denote
plates for the bearing of the balance-wheel arbor and of the regulating lever.
As can be seen in the drawings, the two spiral
hair-springs 1 and 2 are arranged in the same sense of winding rotationally staggered relative to one anotherthrough 180 about the balance-wheel axis.
The projection of one flat spiral hair-spring in a plane normal to the balance-wheel axis proceeds away from that of the other by rotation through a straight angle, namely by 1800, and conversely.
The two spiral hair-springs 1 and 2 are each provided with an overcoil 6 and 7, respectively, being turned outwards in like manner in opposite directions with regard to the balance-wheeld axis.
The regulation may be effected through a symmetrical two-armd lever 4 seated on one balance-wheele cheek in a plane normal to the balance-wheel axis and rotatable with regard to the balance-wheel arbor, which lever spans with associated arms the two spiral hair-springs at the circular regulating ends of the outermost coils.
1. A balance-wheel fortime-keeping instruments, in which two identical spiral hair-springs of flat spiral design are attached at points at any given time diametrally opposite to one another on the one hand to the staff or balance-wheel arbor and on the other hand to the balance-wheel cheek in two planes parallel to one another and normal to the balancewheel axis, the two spiral hair-springs being coiled in the same sense and being rotationally staggered relative to one another through 1800 about the axis of the balance-wheel.
2. A balance-wheel according to claim 1, in which the two spiral hair-springs are each provided with an overcoil and are turned outwards in like manner in opposite directions with regard to the balance-wheel arbor.
3. A balance-wheel according to claim 1 or 2, in which the regulation is effected through a symmetrical two-armed lever seated on the balance-wheel cheek in a plane normal to the balance-wheel arbor and rotatable with regard to the balance-wheel arbor, which lever spans with associated arms the two spiral hair-springs at the circular regulating ends of the outermost coils.
4. A balance-wheel fortime-keeping instruments substantially as hereinbefore described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A balance-wheel fortime-keeping instruments, in which two identical spiral hair-springs of flat spiral design are attached at points at any given time diametrally opposite to one another on the one hand to the staff or balance-wheel arbor and on the other hand to the balance-wheel cheek in two planes parallel to one another and normal to the balancewheel axis, the two spiral hair-springs being coiled in the same sense and being rotationally staggered relative to one another through 1800 about the axis of the balance-wheel.
2. A balance-wheel according to claim 1, in which the two spiral hair-springs are each provided with an overcoil and are turned outwards in like manner in opposite directions with regard to the balance-wheel arbor.
3. A balance-wheel according to claim 1 or 2, in which the regulation is effected through a symmetrical two-armed lever seated on the balance-wheel cheek in a plane normal to the balance-wheel arbor and rotatable with regard to the balance-wheel arbor, which lever spans with associated arms the two spiral hair-springs at the circular regulating ends of the outermost coils.
4. A balance-wheel fortime-keeping instruments substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792902810 DE2902810C2 (en) | 1979-01-25 | 1979-01-25 | Balance for time-keeping devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2039389A true GB2039389A (en) | 1980-08-06 |
Family
ID=6061364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7944265A Withdrawn GB2039389A (en) | 1979-01-25 | 1979-12-21 | Balance-wheel for time-keeping instruments |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS55101884A (en) |
DE (1) | DE2902810C2 (en) |
FR (1) | FR2447571A1 (en) |
GB (1) | GB2039389A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8668378B2 (en) | 2009-10-26 | 2014-03-11 | Societe Anonyme De La Manufacture D'horlogerie Audemars Piguet & Cie | Regulating organ comprising at least two balances |
JP2014089214A (en) * | 2008-07-29 | 2014-05-15 | Rolex Sa | Hairspring for balance wheel/hairspring vibrator |
US8770828B2 (en) | 2010-03-12 | 2014-07-08 | Microtechne Research & Development Center Ltd. | Oscillator system |
TWI463280B (en) * | 2008-03-20 | 2014-12-01 | Nivarox Sa | One-piece double balance spring and method of manufacturing the same |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2485096A1 (en) * | 2007-11-20 | 2012-08-08 | Richemont International S.A. | Mechanical watch movement |
EP2405312A1 (en) * | 2010-07-09 | 2012-01-11 | Montres Breguet S.A. | Balance hairspring with two levels and immobile mass centre |
CH705398B1 (en) * | 2011-08-24 | 2016-11-30 | Montblanc Montre Sa | Regulating organ with a double spiral spring whose turns rise continuously in height. |
JP6013224B2 (en) * | 2013-02-19 | 2016-10-25 | セイコーインスツル株式会社 | Hairspring, movement, watch, and method for manufacturing hairspring |
JP6057766B2 (en) * | 2013-02-19 | 2017-01-11 | セイコーインスツル株式会社 | Hairspring, movement, watch, and method for manufacturing hairspring |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH45160A (en) * | 1909-05-31 | 1909-10-16 | Montres Invar Comp D | Improved escapement for pocket watches |
CH496977A (en) * | 1968-11-29 | 1970-06-15 | Portescap Le Porte | Regulator device for timepiece |
-
1979
- 1979-01-25 DE DE19792902810 patent/DE2902810C2/en not_active Expired
- 1979-12-21 GB GB7944265A patent/GB2039389A/en not_active Withdrawn
-
1980
- 1980-01-23 FR FR8001406A patent/FR2447571A1/en active Pending
- 1980-01-25 JP JP770080A patent/JPS55101884A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI463280B (en) * | 2008-03-20 | 2014-12-01 | Nivarox Sa | One-piece double balance spring and method of manufacturing the same |
US9459589B2 (en) * | 2008-03-20 | 2016-10-04 | Nivarox-Far S.A. | One-piece double balance spring and method of manufacturing the same |
JP2014089214A (en) * | 2008-07-29 | 2014-05-15 | Rolex Sa | Hairspring for balance wheel/hairspring vibrator |
US8668378B2 (en) | 2009-10-26 | 2014-03-11 | Societe Anonyme De La Manufacture D'horlogerie Audemars Piguet & Cie | Regulating organ comprising at least two balances |
US8770828B2 (en) | 2010-03-12 | 2014-07-08 | Microtechne Research & Development Center Ltd. | Oscillator system |
Also Published As
Publication number | Publication date |
---|---|
JPS55101884A (en) | 1980-08-04 |
DE2902810C2 (en) | 1981-01-15 |
FR2447571A1 (en) | 1980-08-22 |
DE2902810B1 (en) | 1980-05-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |